Tom B. wrote:
So, do you mean something like:

select group_concat(RefDes) as Clump
from MyTable
group by cast ((substr(RefDes, 2, 99) - 1) / 50 as integer)

Yes, something like that is just what I needed.  Thanks!

(The designators are not always in such a monotonic sequence, nor is their numerical part so predictable, but those issues can be met in the source table design.)

Thanks, too, for helping me see that I should look at 'group by' clauses more fundamentally.

Best regards,
--
Larry Brasfield

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